745665 has 8 divisors (see below), whose sum is σ = 1193088. Its totient is φ = 397680.

The previous prime is 745649. The next prime is 745673. The reversal of 745665 is 566547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 745665 - 2⁴ = 745649 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24841 + ... + 24870.

It is an arithmetic number, because the mean of its divisors is an integer number (149136).

2⁷⁴⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

745665 is a deficient number, since it is larger than the sum of its proper divisors (447423).

745665 is a wasteful number, since it uses less digits than its factorization.

745665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49719.

The product of its digits is 25200, while the sum is 33.

The square root of 745665 is about 863.5189633123. The cubic root of 745665 is about 90.6806420090.

The spelling of 745665 in words is "seven hundred forty-five thousand, six hundred sixty-five".